EP1323680A1 - Method for recovering nitrates from percolating waters coming from solid urban waste materials - Google Patents
Method for recovering nitrates from percolating waters coming from solid urban waste materials Download PDFInfo
- Publication number
- EP1323680A1 EP1323680A1 EP20020027261 EP02027261A EP1323680A1 EP 1323680 A1 EP1323680 A1 EP 1323680A1 EP 20020027261 EP20020027261 EP 20020027261 EP 02027261 A EP02027261 A EP 02027261A EP 1323680 A1 EP1323680 A1 EP 1323680A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waters
- nitrates
- recovering
- separating
- percolating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/04—Feed pretreatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- the present invention relates to a method for recovering nitrates from percolating waters coming from solid urban waste materials or a preset fraction thereof.
- percolate materials which are generated from urban solid wastes, comprises a comparatively high concentration of ammonia and carbon, and cause at present a lot of problems for properly disposing of them.
- the aim of the present invention is to overcome the above mentioned drawbacks, by providing a method for recovering nitrates from percolating water coming from urban solid wastes or a preselected fraction thereof, allowing to perform a process suitable to provide a product which can be used on waste composting masses, to reduce the bad odors therefrom, while allowing to provide a good quality water which can be used for several further applications.
- a main object of the present invention is to provide such a method allowing to obtain a mixed composted material, having very high agronomic properties.
- Yet another object of the present invention is to provide such a method which, owing to its specifically designed features, is very safe and reliable in operation.
- Yet another object of the present invention is to provide such a method which can be managed in a simple and economic manner, thereby consequently optimizing all of the operating parameters of the method.
- a method for recovering nitrates from percolating waters coming from urban solid waste or a preset fraction thereof characterized in that said method comprises the steps of subjecting said percolating waters to an aerobic process for nitrificating ammonia present in said waters and oxidating further organic materials in said waters, subjecting the processed waters to a further reverse osmosis process thereby separating a reusable permeate material and a nitrate-rich concentrate material.
- the method according to the invention for recovering nitrates from percolating waters coming from solid urban waste materials or a preset fraction thereof comprises a step of performing a biologic process, in a full nitrification conditions, which is so carried out as to fully nitrificating ammonia and precursors thereof present in the percolated waters, so as to transform them into nitrates, while simultaneously oxidating the organic materials present in said waters.
- the percolate materials which have been generally indicated at the block 1 in the accompanying drawings, are subjected to the oxidation and nitrification process by optionally using an ultrafiltering system for ultra-filtering the active sludges, said system being indicated at the reference number 2, in particular by using semipermeable membranes, immersed in the oxidating basins.
- the ultrafiltering process would allow to separate the sludges directly in the oxidating basin, without the need of using a clarifying device arranged downstream of said oxidating basin.
- the biologic treatment as shown, for example, in the schematic diagram of figure 3, can be performed in an active-sludge system 3, of any desired conventional types, with an oxidation of the residue materials, followed by a sludge settling and recirculating step.
- an anaerobic system including a digestor 4, suitable to provide a great reduction of the organic materials, with development of biogas and with a consequent possibility of easily performing any power recovering operations.
- an anaerobic processing system Downstream of the digestor device, in particular, an anaerobic processing system will be arranged.
- the reverse osmosis system 6, in particular, owing to the applied pressure, will separate the processed water into a permeate, indicated by the reference number 7, comprising good quality clarified water, devoid of colloidal materials and bacteria, as well as organic substances, and into a concentrate 8 including all of the impurities.
- the permeate material can be reused inside said system as service water, antifire system water and so on.
- heavy metals would be present in the concentrate material from the reverse osmosis, then said heavy metals will be stripped or removed by a heavy metal stripping system 9, including conventional stripping means.
- the reverse osmosis concentrate rich in nitrates, can be used for spraying composting waste piles or masses, as generally indicated at the reference number 10 in the accompanying drawings.
- Said composting masses are subjected to a first step of aerating and moistening, to provide a degradation of the organic substances therein contained by aerobic microorganisms, while reducing the bad odor gaseous evolved substances.
- Optimum contents of moisture as necessary for a microbic population suitable to metabolize the organic materials would be included in a 50-70% range.
- the supplied nitrates will favor, in this operating step, greater nitrogen contents in the mixed composted material, thereby increasing their intrinsic agronomic value.
- the invention provides a method eliminating the cost which will be necessary for disposing of the reverse osmosis concentrate material.
- Said method moreover, allows to provide a mixed composted material, having high agronomic properties and allowing to produce very good quality water, while reducing the bad odors in the composting waste masses.
- the used materials, as well as the contingent size and shapes of the system can be any depending on requirements.
Abstract
The present invention relates to a method
for recovering nitrates from percolating waters
coming from solid urban waste materials, or a preset
fraction thereof, comprising the steps of subjecting
said percolating waters to an aerobic process for
oxidating the organic materials contained therein and
for nitrificating ammonia and precursors thereof
present in said waters, subjecting the processed
waters to a further reverse osmosis process, for
separating a re-usable permeate and a concentrate
material rich in dissolved salts.
Description
- The present invention relates to a method for recovering nitrates from percolating waters coming from solid urban waste materials or a preset fraction thereof.
- As is known, percolate materials which are generated from urban solid wastes, comprises a comparatively high concentration of ammonia and carbon, and cause at present a lot of problems for properly disposing of them.
- Such a disposal of procedure, involves a high disposal of cost, which negatively affect the managing of the process.
- Accordingly, the aim of the present invention is to overcome the above mentioned drawbacks, by providing a method for recovering nitrates from percolating water coming from urban solid wastes or a preselected fraction thereof, allowing to perform a process suitable to provide a product which can be used on waste composting masses, to reduce the bad odors therefrom, while allowing to provide a good quality water which can be used for several further applications.
- Within the scope of the above mentioned aim, a main object of the present invention is to provide such a method allowing to obtain a mixed composted material, having very high agronomic properties.
- Yet another object of the present invention is to provide such a method which, owing to its specifically designed features, is very safe and reliable in operation.
- Yet another object of the present invention is to provide such a method which can be managed in a simple and economic manner, thereby consequently optimizing all of the operating parameters of the method.
- According to one aspect of the present invention, the above mentioned aim and objects, as well as yet other objects, which will become more apparent hereinafter, are achieved by a method for recovering nitrates from percolating waters coming from urban solid waste or a preset fraction thereof, characterized in that said method comprises the steps of subjecting said percolating waters to an aerobic process for nitrificating ammonia present in said waters and oxidating further organic materials in said waters, subjecting the processed waters to a further reverse osmosis process thereby separating a reusable permeate material and a nitrate-rich concentrate material.
- Further characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred, though not exclusive, embodiment of a method for recovering nitrates from percolating waters coming from solid urban waste materials or a preset fraction thereof, which is illustrated, by way of an indicative, but not limitative, example, in the accompanying drawings, where:
- Figure 1 shows an operating diagram of the method including an active-sludge biologic system, provided with ultra filtering means;
- Figure 2 shows a schematic diagram of a method by which is carried out a preliminarily anaerobic operating step;
- Figure 3 illustrates a schematic diagram of a method performed in an active-sludge biologic system, provided with sludge settling means; and
- Figure 4 illustrates a further schematic diagram of a method in which is carried out a preliminarily anaerobic operating step or operation.
-
- With reference to the above mentioned figures, the method according to the invention for recovering nitrates from percolating waters coming from solid urban waste materials or a preset fraction thereof, comprises a step of performing a biologic process, in a full nitrification conditions, which is so carried out as to fully nitrificating ammonia and precursors thereof present in the percolated waters, so as to transform them into nitrates, while simultaneously oxidating the organic materials present in said waters.
- The percolate materials, which have been generally indicated at the
block 1 in the accompanying drawings, are subjected to the oxidation and nitrification process by optionally using an ultrafiltering system for ultra-filtering the active sludges, said system being indicated at thereference number 2, in particular by using semipermeable membranes, immersed in the oxidating basins. - The ultrafiltering process would allow to separate the sludges directly in the oxidating basin, without the need of using a clarifying device arranged downstream of said oxidating basin.
- The biologic treatment, as shown, for example, in the schematic diagram of figure 3, can be performed in an active-
sludge system 3, of any desired conventional types, with an oxidation of the residue materials, followed by a sludge settling and recirculating step. - Before the biologic treatment step, it would be possible to provide an anaerobic system including a
digestor 4, suitable to provide a great reduction of the organic materials, with development of biogas and with a consequent possibility of easily performing any power recovering operations. - Downstream of the digestor device, in particular, an anaerobic processing system will be arranged.
- Downstream of the active-sludge biologic aerobic system, which can be provided with means for separating the biomasses by settling or ultrafiltering, it would be moreover possible to provide a further settling and/or filtering
step 11, before the inlet to thereverse osmosis system 6. - The
reverse osmosis system 6, in particular, owing to the applied pressure, will separate the processed water into a permeate, indicated by thereference number 7, comprising good quality clarified water, devoid of colloidal materials and bacteria, as well as organic substances, and into aconcentrate 8 including all of the impurities. - In particular, the permeate material can be reused inside said system as service water, antifire system water and so on.
- If heavy metals would be present in the concentrate material from the reverse osmosis, then said heavy metals will be stripped or removed by a heavy
metal stripping system 9, including conventional stripping means. - The reverse osmosis concentrate, rich in nitrates, can be used for spraying composting waste piles or masses, as generally indicated at the
reference number 10 in the accompanying drawings. - Said composting masses, in particular, are subjected to a first step of aerating and moistening, to provide a degradation of the organic substances therein contained by aerobic microorganisms, while reducing the bad odor gaseous evolved substances.
- Optimum contents of moisture as necessary for a microbic population suitable to metabolize the organic materials, would be included in a 50-70% range.
- Thus, the required moistening of the organic waste masses would constitute per se a depurating system proper.
- The supplied nitrates will favor, in this operating step, greater nitrogen contents in the mixed composted material, thereby increasing their intrinsic agronomic value.
- Moreover, if anoxic pockets would be formed in said composting masses, then the spraying of nitrates would make oxygen available for the composting population, so as to greatly reduce the development of bad odors.
- From the above disclosure it should be apparent that the invention fully achieves the intended aim and objects.
- In particular, the invention provides a method eliminating the cost which will be necessary for disposing of the reverse osmosis concentrate material.
- Said method, moreover, allows to provide a mixed composted material, having high agronomic properties and allowing to produce very good quality water, while reducing the bad odors in the composting waste masses.
- The invention, as disclosed, is susceptible to several modifications and variations, all of which will come within the scope of the invention.
- Moreover, all the process steps can be replaced by other technically equivalent process steps.
- In practicing the invention, the used materials, as well as the contingent size and shapes of the system can be any depending on requirements.
Claims (8)
- A method for recovering nitrates from percolating waters coming from urban solid waste or a preset fraction thereof, characterized in that said method comprises the steps of subjecting said percolating waters to an aerobic process for nitrificating ammonia present in said waters and oxidating further organic materials in said waters, subjects the processed water to a further reverse osmosis process thereby separating a reusable permeate material and a nitrate-rich concentrate material.
- A method, according to the preceding claim, characterized in that said aerobic process is carried out in an active-sludge system with separating means and ultrafiltering means for separating and ultrafiltering the biomass being processed, by using semipermeable membranes either immersed or not in oxidating basins.
- A method, according to Claims 1 and 2, characterized in that said aerobic process is carried out in an active-sludge system having separating means for separating the biomass by settling and recirculating the sludge.
- A method, according to one or more of the preceding claims, characterized in that said method comprises an anaerobic processing step, carried out before the aerobic process or treatment, for reducing the organic materials and forming biogas.
- A method, according to one or more of the preceding claims, characterized in that said method further comprises the step of carrying out a settling and/or filtering step downstream of said aerobic processing step.
- A method, according to one or more of the preceding claims, characterized in that said method further comprises the step of subjecting the concentrate material deriving from the reverse osmosis to a stripping step for stripping heavy metals present in said concentrate material.
- A method, according to one or more of the preceding claims, characterized in that the concentrate material derived from said reverse osmosis is used for spraying composting waste masses.
- A method for recovering nitrates from percolating waters coming from solid urban waste materials, or a preset fraction thereof, and substantially as broadly disclosed and illustrated and for the intended aim and objects.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20012610 | 2001-12-11 | ||
IT2001MI002610A ITMI20012610A1 (en) | 2001-12-11 | 2001-12-11 | PROCEDURE FOR THE RECOVERY OF NITRATES FROM PERCOLATION WATERS, COMING FROM SOLID URBAN WASTE OR FROM A PRE-SELECTED FRACTION |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1323680A1 true EP1323680A1 (en) | 2003-07-02 |
Family
ID=11448683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020027261 Withdrawn EP1323680A1 (en) | 2001-12-11 | 2002-12-06 | Method for recovering nitrates from percolating waters coming from solid urban waste materials |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1323680A1 (en) |
IT (1) | ITMI20012610A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2300179A1 (en) * | 2006-04-03 | 2008-06-01 | C.P. Srl Control Of Pollution | System for treatment of waste of food industry, includes obtaining concentrated brine with suitable characteristics for reutilization of waste for use in agriculture as organic amendment |
EP2350400A1 (en) * | 2008-09-10 | 2011-08-03 | European Space Agency | Instalation for the treatment of urea containing water, toilet, stable and method |
ITVE20120025A1 (en) * | 2012-07-16 | 2014-01-17 | C P S R L Control Pollution | PROCESS OF TREATMENT OF THE PERCOLATE COMING FROM LANDFILL OF SOLID URBAN WASTE. |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02164500A (en) * | 1988-12-19 | 1990-06-25 | Meidensha Corp | Water purifying treatment apparatus |
EP0413356A1 (en) * | 1989-08-18 | 1991-02-20 | Osaka Gas Co., Ltd. | Process for treating waste water |
WO1991007354A1 (en) * | 1989-11-15 | 1991-05-30 | Irving Ainsworth (Holdings) Limited | Water treatment method |
JPH04305287A (en) * | 1991-04-01 | 1992-10-28 | Kubota Corp | Water treating equipment |
JPH07232192A (en) * | 1994-02-23 | 1995-09-05 | Kubota Corp | Treatment of sewage |
US6146532A (en) * | 1996-04-03 | 2000-11-14 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Process for the biological purification of wastewater |
-
2001
- 2001-12-11 IT IT2001MI002610A patent/ITMI20012610A1/en unknown
-
2002
- 2002-12-06 EP EP20020027261 patent/EP1323680A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02164500A (en) * | 1988-12-19 | 1990-06-25 | Meidensha Corp | Water purifying treatment apparatus |
EP0413356A1 (en) * | 1989-08-18 | 1991-02-20 | Osaka Gas Co., Ltd. | Process for treating waste water |
WO1991007354A1 (en) * | 1989-11-15 | 1991-05-30 | Irving Ainsworth (Holdings) Limited | Water treatment method |
JPH04305287A (en) * | 1991-04-01 | 1992-10-28 | Kubota Corp | Water treating equipment |
JPH07232192A (en) * | 1994-02-23 | 1995-09-05 | Kubota Corp | Treatment of sewage |
US6146532A (en) * | 1996-04-03 | 2000-11-14 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Process for the biological purification of wastewater |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 427 (C - 0758) 13 September 1990 (1990-09-13) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 131 (C - 1036) 18 March 1993 (1993-03-18) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 01 31 January 1996 (1996-01-31) * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2300179A1 (en) * | 2006-04-03 | 2008-06-01 | C.P. Srl Control Of Pollution | System for treatment of waste of food industry, includes obtaining concentrated brine with suitable characteristics for reutilization of waste for use in agriculture as organic amendment |
EP2350400A1 (en) * | 2008-09-10 | 2011-08-03 | European Space Agency | Instalation for the treatment of urea containing water, toilet, stable and method |
CN102203354A (en) * | 2008-09-10 | 2011-09-28 | 欧洲航天局 | Instalation for the treatment of urea containing water, toilet, stable and method |
JP2012501848A (en) * | 2008-09-10 | 2012-01-26 | ヨーロピアン・スペース・エージェンシー | Equipment, toilet, livestock shed and method for treatment of urea-containing water |
CN102203354B (en) * | 2008-09-10 | 2015-05-27 | 欧洲航天局 | Instalation for the treatment of urea containing water, toilet, stable and method |
ITVE20120025A1 (en) * | 2012-07-16 | 2014-01-17 | C P S R L Control Pollution | PROCESS OF TREATMENT OF THE PERCOLATE COMING FROM LANDFILL OF SOLID URBAN WASTE. |
Also Published As
Publication number | Publication date |
---|---|
ITMI20012610A1 (en) | 2003-06-11 |
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